Martin cosgro



`arrows. rlhe bed-st0ne B projects a little way above the bottom of the curb C, and the fans b I) extend,

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.Letters Patent No. 63,479, dated April 2, 1867.

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TO ALL WHOM IT MAY OONCERN: l

Be it known` that l, MARTIN OOSGRO, of Peora;, in the county of Peoria, and State of Illinos,.have invented a new and useful Improvement in Attachments to Millstones for Cooling the Meal, Src.; and I do hereby declare that the following is afull, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this speciication, in whichjy igure 1 is a central vertical section of the curbing around a run of inillstones, which are shown inside elevation with Iny improved refrigerating Iattachnylents,taken in the line z :11, iig. 2.

Figure 2 is a plan or top View of a run of stones showing my improved slides over the curb for regulating the admission of air in to the eye of the stones.

Figure 3 is a horizontal section taken in the plane of the liney y, iig. l.

Similar letters of reference indicate like parts.

This invention relates to improvements in devices applied vto millstones, for the purpose oi' cooling` the meal, dissipating the moisture nrisingifrom the grain generally in grinding, and keeping the curb clean and dry. These devices consist in wings or fans attached to the top and side of the runner, in such manner that currents of fresh air are drawn and circulated within the curb, and directed upon andinto the meal when it is discharged from between the millstones. The effect ot`.this constant draught through the curb is also to prevent any accumulation of meal in the bottom to sour and spoil. In connection with these improved devices for creating a current of air, adjustable sliding doors are arranged in the top of the curb for regulating the quantity ot' cold airadmitted.

A represents a frame supporting a run of stones, of which B is the runner, and B the bed-stone, s ur rounded as usual by a curb, C. On the top of the runner is fastened a series of fans or wings, a a, hinged or stationary, which rise high enough to clear theinside of the curb, and extend from the periphery of the stone inwardly at au acute angle with the radii in the direction toward or abreast of the current of air produced by thc motion of' ythe stone, as indicated by the arrow in fig* l', and shown in fig. 3. These fans are made of sheet metal or any suitable material, On the sides of the runner are fastened similar fans or wings., l) b, the upper ends of which join the ends of thcrings a a, and the lower ends of which set back from a perpendicular line,

or recede from the current of air produced by the motion ci' thc stone, as shown in iig. 1, and indicated by the faces of thc stones so as just to clear the bottom. On the upper side of the curb' O are placed slides, D i), on each side of the spindle c, the edges of which may be brought nearer together or further apart over the eye of the runner, and thus regulate the admission of more or less 'cold air as desired by the miller.

Having described my invention, I claim as new, and desire to secure by Letters Patent- The nii'llstones constructed with oblique top wings a, connected to oblique side wings band operating suustantially as described for the purpose specified.

MARTIN COSGRO.

Witnesses:

Gro. H. REYNOLDS, B. l". Wannes. i 

